Best AGM battery?

[Track Junky]

My $.02

I have been buying red top optima's since 2000. First and second one lasted me about 5 years each. Last year I bought another red top from Oreilly's. Went bad in a month. In a 6 or 7 month period I returned 5 batteries. All had a dead cell when returned. After the 5th battery they told me this is the last time. I went to Tagnotti's and picked up a red top there. All is good with this one and its been in my car for about 8 months now.

Something must have gone wrong somewhere with Optima maybe for a short period of time is what I'm guessing.